Fire extinguisher



Feb. 2 1926.

W. GRIMSHAW 7 FIRE EXTINGUISHER Filed April 10, 1922 Wsnevs WWW/.

Patented Feb. 2, 192.6.

UNITED stares WILLIAM GRIIVISI-IAW', OF GLEN ELLYN, ILLINOIS.

FIB/E EX'lINGUISI-IER.

Application filed April 10, 1922.

To aZZ whom it may concern:

Be it known that I, lVILLi'Aar Garner-raw, a citizen of the United States, and a resident of Glen Ellyn, in the county of Du Page and State of Illinois, have invented a new and useful F ire Extinguisher, of which the following is a specification.

This invention relates particularly to automatic sprinkle and the object is to improve and simplify the construction of the sprinkler to the end that the parts thereof will be subjected to desired operating stresses, as more fully hereinafter set forth.

In the accompanying drawing,

Figure 1 is a side view, partly in section, of said sprinkler finished and ready for use; and

Figures 2 and 3 are enlarged and exaggerated, diagrannnatic, sectional views illustrating the process of construction.

Referring now to the drawings, A designotes the sprinkler as a whole, which, as regards its usual features and excepting as hereinafter particularly described, may be of any usual or approved construction and will be readily understood by persons familiar with the art without a description thereof in detail.

As shown, the sprinkler is of the type in which the water discharge nozzle 1 is adapted to be closed by a valve cap 2 which is secured in closed position by toggle levers which comprise articulated strut members 3 and a, the remote ends of which, respectively, engage recessed bearings 5 and 6 formed in the valve cap 2 and in a pin 7 secured against endwise movement in hole 8 formed lengthwise through the boss or abutment 9 formed integral with and which rigidly connects the outer ends of the side arms 10 and 11 of the sprinkler frame. Said toggle levers also comprise laterally pr jectiug arms 12 and 13, the ends of which are connected by a fusible member 14:, which may be of desired or approved construction.

I wish it understood, however, that excepting as regards the means for securing the stressing pin 7 in position, the particular means shown for securing the valve cap 2 in closed position have no necessary relation to the present invention, and I do not, therefore, desire to limit my self thereto, as my invention contemplates the use of any desired or approved means for this purpose.

In accordance with my invention, a pin Serial No. 551,025.

7 is secured in position in a hole 8 in the boss or abutment 9 corresponding to a de sired stressing of the parts of the sprinkler, said pin being secured. in position by an interlocking bead and groove 15 and 16 formed, respectively, on the boss or abutment 9 within the hole or bore 8, and in the pin 7. The head 15 may be either continuous or segmental, While the groove 18 will be continuous.

Stressing of the sprinkler and interlocking ofthe head 15 with the groove 16 to maintain the parts of the sprinkler under desired operating stress is effected as follows The parts of the sprinkler are first finished, including the formation of the groove 16 in the pin 7, the relation being preferably such that, excepting at its in ner end, said pin will lit the hole or bore 8 in the boss or abutment 9 with a tight and preferably a driving fit. At its inner end said pin will comprise a short section of such small size that it will enter the outer end of said hole or bore freelyor, what amounts to the same thing, the outer end of said hole or bore may be slightly enlarged.

The parts of the sprinkler having been finished, they are next assembled and temporarily supported in operative position and the pin 7 forced endwise through the hole 8 to effect engagement of the recessed hearing 6 in its inner end with the end of the strut member 4:, the pressure being thereafter continued with sufiicient force to subjoct the parts of the sprinkler to desired operating stress, while the boss or abutment 9 is held against movement under the pressure exerted on said stressing pin. When the parts of the sprinkler are under desired operating stress, they are locked in such position by swaging the boss or abutment 9 inwardly to form the bead 15 in proper position to interlock with groove 16 in the pin 7. To avoidtoo great nicety in the relative positions of the swaging devices and the groove 16, said groove is made relatively long and is formed on a slight taper decreasing in diameter towards the outer end of said pin. Thus, if the head 15 engages the tapered surface of the groove 16 at any point in its length, it will prevent endwise movement of said pin tending to reduce the stress on the parts of the sprinkler.

Both the pressure 011 the pin 7 and the sWaging action on the boss .01 abutment 9 will preferably progress slowly to permit ample time for the parts afiected to adjust themselves gradually thereto.

Tools r machines suitable for thus stressing the sprinkler and for exerting desired swaging action on the boss or abutment 9 can readily be devised by mechanics skilled in the art, or machines now available commercially, can readily be adapted for the purpose.

It will be observed that the boss 9 projects above the frame-bars 10-11 and that it is cylindrical in shape; this lends itselfnicely to the swaging operation. It will be ob served that the groove 16 is so positioned in the pin that it lies, when the stressing operation is completed at a point above the frame-bars, so that the swaging operation may be performed on the upwardly-projecting part of the boss; this makes a very inexpensive and convenient operation. It will be observed also that this position of the swaging groove 16 enables the swaging bead to be readily run entirely around the boss to thus so solidly lock the pin in the adjust-- ed position as to preclude any possibility of the pin loosening under prolonged pressure.

I claim A' means for stressing an automatic sprinkler comprising a sprinkler-frame having a portion adapted to be swaged and constructed with a hole to receive a stressingpin, a stressing-pin adapted to fit said hole and provided with an elongated tapered portion decreasing in diameter towards its outer end, said tapered portion being adapted to lie in different positions in different sprinklers relative to the portion of the frame to be swaged, so'that, when the exact stressing position of the pin is reached in different sprinkle-rs the swaged portion will engage some portion of the tapered portion of the pin and thus lock it in the stressing position.

In testimony that I claim the foregoing as my invention, I affix my signature this lth day of April, 1922.

* IVILLIAM GRIMSHAIV. 

